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<a class="jxr_linenumber" name="L1" href="#L1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L2" href="#L2">2</a>   <em class="jxr_comment"> * Copyright (C) 2008 feilong</em>
<a class="jxr_linenumber" name="L3" href="#L3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L4" href="#L4">4</a>   <em class="jxr_comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em>
<a class="jxr_linenumber" name="L5" href="#L5">5</a>   <em class="jxr_comment"> * you may not use this file except in compliance with the License.</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a>   <em class="jxr_comment"> * You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a>   <em class="jxr_comment"> *         <a href="http://www.apache.org/licenses/LICENSE-2." target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.</a>0</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a>  <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a>  <em class="jxr_comment"> * See the License for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a>  <em class="jxr_comment"> * limitations under the License.</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a>  <strong class="jxr_keyword">package</strong> com.feilong.core.lang.reflect;
<a class="jxr_linenumber" name="L17" href="#L17">17</a>  
<a class="jxr_linenumber" name="L18" href="#L18">18</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.junit.Assert.assertEquals;
<a class="jxr_linenumber" name="L19" href="#L19">19</a>  
<a class="jxr_linenumber" name="L20" href="#L20">20</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Field;
<a class="jxr_linenumber" name="L21" href="#L21">21</a>  
<a class="jxr_linenumber" name="L22" href="#L22">22</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.lang3.ArrayUtils;
<a class="jxr_linenumber" name="L23" href="#L23">23</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.lang3.Validate;
<a class="jxr_linenumber" name="L24" href="#L24">24</a>  <strong class="jxr_keyword">import</strong> org.apache.commons.lang3.reflect.FieldUtils;
<a class="jxr_linenumber" name="L25" href="#L25">25</a>  <strong class="jxr_keyword">import</strong> org.junit.Test;
<a class="jxr_linenumber" name="L26" href="#L26">26</a>  <strong class="jxr_keyword">import</strong> org.slf4j.Logger;
<a class="jxr_linenumber" name="L27" href="#L27">27</a>  <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory;
<a class="jxr_linenumber" name="L28" href="#L28">28</a>  
<a class="jxr_linenumber" name="L29" href="#L29">29</a>  <strong class="jxr_keyword">import</strong> com.feilong.core.HttpMethodTestType;
<a class="jxr_linenumber" name="L30" href="#L30">30</a>  <strong class="jxr_keyword">import</strong> com.feilong.core.TimeInterval;
<a class="jxr_linenumber" name="L31" href="#L31">31</a>  <strong class="jxr_keyword">import</strong> com.feilong.core.lang.ClassUtil;
<a class="jxr_linenumber" name="L32" href="#L32">32</a>  <strong class="jxr_keyword">import</strong> com.feilong.tools.slf4j.Slf4jUtil;
<a class="jxr_linenumber" name="L33" href="#L33">33</a>  
<a class="jxr_linenumber" name="L34" href="#L34">34</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> com.feilong.core.TimeInterval.SECONDS_PER_WEEK;
<a class="jxr_linenumber" name="L35" href="#L35">35</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> com.feilong.core.Validator.isNullOrEmpty;
<a class="jxr_linenumber" name="L36" href="#L36">36</a>  
<a class="jxr_linenumber" name="L37" href="#L37">37</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L38" href="#L38">38</a>  <em class="jxr_javadoccomment"> * The Class FieldUtilTest.</em>
<a class="jxr_linenumber" name="L39" href="#L39">39</a>  <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L40" href="#L40">40</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://feitianbenyue.iteye.com/" target="alexandria_uri">http://feitianbenyue.iteye.com/</a>"&gt;feilong&lt;/a&gt;</em>
<a class="jxr_linenumber" name="L41" href="#L41">41</a>  <em class="jxr_javadoccomment"> * @since 1.0.7</em>
<a class="jxr_linenumber" name="L42" href="#L42">42</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L43" href="#L43">43</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/feilong/core/lang/reflect/FieldUtilTemp.html">FieldUtilTemp</a>{
<a class="jxr_linenumber" name="L44" href="#L44">44</a>  
<a class="jxr_linenumber" name="L45" href="#L45">45</a>      <em class="jxr_javadoccomment">/** The Constant LOGGER. */</em>
<a class="jxr_linenumber" name="L46" href="#L46">46</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger LOGGER = LoggerFactory.getLogger(FieldUtilTemp.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="L47" href="#L47">47</a>  
<a class="jxr_linenumber" name="L48" href="#L48">48</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L49" href="#L49">49</a>  <em class="jxr_javadoccomment">     * Test get static property1.</em>
<a class="jxr_linenumber" name="L50" href="#L50">50</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L51" href="#L51">51</a>      @Test
<a class="jxr_linenumber" name="L52" href="#L52">52</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetStaticProperty1(){
<a class="jxr_linenumber" name="L53" href="#L53">53</a>          assertEquals(HttpMethodTestType.POST, getStaticFieldValue(HttpMethodTestType.<strong class="jxr_keyword">class</strong>.getName(), <span class="jxr_string">"POST"</span>));
<a class="jxr_linenumber" name="L54" href="#L54">54</a>          assertEquals(SECONDS_PER_WEEK, getStaticFieldValue(TimeInterval.<strong class="jxr_keyword">class</strong>.getName(), <span class="jxr_string">"SECONDS_PER_WEEK"</span>));
<a class="jxr_linenumber" name="L55" href="#L55">55</a>      }
<a class="jxr_linenumber" name="L56" href="#L56">56</a>  
<a class="jxr_linenumber" name="L57" href="#L57">57</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L58" href="#L58">58</a>  <em class="jxr_javadoccomment">     * Test get static property2.</em>
<a class="jxr_linenumber" name="L59" href="#L59">59</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L60" href="#L60">60</a>      @Test(expected = NullPointerException.<strong class="jxr_keyword">class</strong>)
<a class="jxr_linenumber" name="L61" href="#L61">61</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetStaticProperty2(){
<a class="jxr_linenumber" name="L62" href="#L62">62</a>          getStaticFieldValue(<strong class="jxr_keyword">null</strong>, <span class="jxr_string">"POST"</span>);
<a class="jxr_linenumber" name="L63" href="#L63">63</a>      }
<a class="jxr_linenumber" name="L64" href="#L64">64</a>  
<a class="jxr_linenumber" name="L65" href="#L65">65</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L66" href="#L66">66</a>  <em class="jxr_javadoccomment">     * Test get static property3.</em>
<a class="jxr_linenumber" name="L67" href="#L67">67</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L68" href="#L68">68</a>      @Test(expected = NullPointerException.<strong class="jxr_keyword">class</strong>)
<a class="jxr_linenumber" name="L69" href="#L69">69</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetStaticProperty3(){
<a class="jxr_linenumber" name="L70" href="#L70">70</a>          getStaticFieldValue(HttpMethodTestType.<strong class="jxr_keyword">class</strong>.getName(), <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="L71" href="#L71">71</a>      }
<a class="jxr_linenumber" name="L72" href="#L72">72</a>  
<a class="jxr_linenumber" name="L73" href="#L73">73</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a>  <em class="jxr_javadoccomment">     * Test get static property4.</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a>      @Test(expected = IllegalArgumentException.<strong class="jxr_keyword">class</strong>)
<a class="jxr_linenumber" name="L77" href="#L77">77</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetStaticProperty4(){
<a class="jxr_linenumber" name="L78" href="#L78">78</a>          getStaticFieldValue(HttpMethodTestType.<strong class="jxr_keyword">class</strong>.getName(), <span class="jxr_string">"  "</span>);
<a class="jxr_linenumber" name="L79" href="#L79">79</a>      }
<a class="jxr_linenumber" name="L80" href="#L80">80</a>  
<a class="jxr_linenumber" name="L81" href="#L81">81</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L82" href="#L82">82</a>  <em class="jxr_javadoccomment">     * 获得Field[] fields,每个field name 拼成数组.</em>
<a class="jxr_linenumber" name="L83" href="#L83">83</a>  <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L84" href="#L84">84</a>  <em class="jxr_javadoccomment">     * @param fields</em>
<a class="jxr_linenumber" name="L85" href="#L85">85</a>  <em class="jxr_javadoccomment">     *            the fields</em>
<a class="jxr_linenumber" name="L86" href="#L86">86</a>  <em class="jxr_javadoccomment">     * @return 如果 &lt;code&gt;fields&lt;/code&gt; 是null或者empty,返回 {@link ArrayUtils#EMPTY_STRING_ARRAY}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L87" href="#L87">87</a>  <em class="jxr_javadoccomment">     * @see java.lang.reflect.Field#getName()</em>
<a class="jxr_linenumber" name="L88" href="#L88">88</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L89" href="#L89">89</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> String[] getFieldsNames(Field[] fields){
<a class="jxr_linenumber" name="L90" href="#L90">90</a>          <strong class="jxr_keyword">if</strong> (isNullOrEmpty(fields)){
<a class="jxr_linenumber" name="L91" href="#L91">91</a>              <strong class="jxr_keyword">return</strong> ArrayUtils.EMPTY_STRING_ARRAY;
<a class="jxr_linenumber" name="L92" href="#L92">92</a>          }
<a class="jxr_linenumber" name="L93" href="#L93">93</a>          String[] fieldNames = <strong class="jxr_keyword">new</strong> String[fields.length];
<a class="jxr_linenumber" name="L94" href="#L94">94</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> j = 0; j &lt; fields.length; ++j){
<a class="jxr_linenumber" name="L95" href="#L95">95</a>              fieldNames[j] = fields[j].getName();
<a class="jxr_linenumber" name="L96" href="#L96">96</a>          }
<a class="jxr_linenumber" name="L97" href="#L97">97</a>          <strong class="jxr_keyword">return</strong> fieldNames;
<a class="jxr_linenumber" name="L98" href="#L98">98</a>      }
<a class="jxr_linenumber" name="L99" href="#L99">99</a>  
<a class="jxr_linenumber" name="L100" href="#L100">100</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L101" href="#L101">101</a> <em class="jxr_javadoccomment">     * 设置字段值.</em>
<a class="jxr_linenumber" name="L102" href="#L102">102</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L103" href="#L103">103</a> <em class="jxr_javadoccomment">     * &lt;p&gt;</em>
<a class="jxr_linenumber" name="L104" href="#L104">104</a> <em class="jxr_javadoccomment">     * 如果 &lt;code&gt;owner&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L105" href="#L105">105</a> <em class="jxr_javadoccomment">     * 如果 &lt;code&gt;fieldName&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L106" href="#L106">106</a> <em class="jxr_javadoccomment">     * 如果 &lt;code&gt;fieldName&lt;/code&gt; 是blank,抛出 {@link IllegalArgumentException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L107" href="#L107">107</a> <em class="jxr_javadoccomment">     * &lt;/p&gt;</em>
<a class="jxr_linenumber" name="L108" href="#L108">108</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="L109" href="#L109">109</a> <em class="jxr_javadoccomment">     * @param owner</em>
<a class="jxr_linenumber" name="L110" href="#L110">110</a> <em class="jxr_javadoccomment">     *            the owner</em>
<a class="jxr_linenumber" name="L111" href="#L111">111</a> <em class="jxr_javadoccomment">     * @param fieldName</em>
<a class="jxr_linenumber" name="L112" href="#L112">112</a> <em class="jxr_javadoccomment">     *            字段</em>
<a class="jxr_linenumber" name="L113" href="#L113">113</a> <em class="jxr_javadoccomment">     * @param value</em>
<a class="jxr_linenumber" name="L114" href="#L114">114</a> <em class="jxr_javadoccomment">     *            值</em>
<a class="jxr_linenumber" name="L115" href="#L115">115</a> <em class="jxr_javadoccomment">     * @see java.lang.Object#getClass()</em>
<a class="jxr_linenumber" name="L116" href="#L116">116</a> <em class="jxr_javadoccomment">     * @see java.lang.Class#getField(String)</em>
<a class="jxr_linenumber" name="L117" href="#L117">117</a> <em class="jxr_javadoccomment">     * @see java.lang.reflect.Field#set(Object, Object)</em>
<a class="jxr_linenumber" name="L118" href="#L118">118</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L119" href="#L119">119</a> <em class="jxr_javadoccomment">     * @see org.apache.commons.lang3.reflect.FieldUtils#writeField(Field, Object, Object, boolean)</em>
<a class="jxr_linenumber" name="L120" href="#L120">120</a> <em class="jxr_javadoccomment">     * @since 1.4.0</em>
<a class="jxr_linenumber" name="L121" href="#L121">121</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L122" href="#L122">122</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> setFieldValue(Object owner,String fieldName,Object value){
<a class="jxr_linenumber" name="L123" href="#L123">123</a>         Validate.notNull(owner, <span class="jxr_string">"owner can't be null!"</span>);
<a class="jxr_linenumber" name="L124" href="#L124">124</a>         Validate.notBlank(fieldName, <span class="jxr_string">"fieldName can't be blank!"</span>);
<a class="jxr_linenumber" name="L125" href="#L125">125</a>         <strong class="jxr_keyword">try</strong>{
<a class="jxr_linenumber" name="L126" href="#L126">126</a>             Class&lt;?&gt; ownerClass = owner.getClass();
<a class="jxr_linenumber" name="L127" href="#L127">127</a>             Field field = ownerClass.getField(fieldName);
<a class="jxr_linenumber" name="L128" href="#L128">128</a>             field.set(ownerClass, value);
<a class="jxr_linenumber" name="L129" href="#L129">129</a>         }<strong class="jxr_keyword">catch</strong> (Exception e){
<a class="jxr_linenumber" name="L130" href="#L130">130</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ReflectException(e);
<a class="jxr_linenumber" name="L131" href="#L131">131</a>         }
<a class="jxr_linenumber" name="L132" href="#L132">132</a>     }
<a class="jxr_linenumber" name="L133" href="#L133">133</a> 
<a class="jxr_linenumber" name="L134" href="#L134">134</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L135" href="#L135">135</a> <em class="jxr_javadoccomment">     * 返回一个 {@link Field}对象,该对象反映此 Class对象所表示的类或接口的指定已声明字段.</em>
<a class="jxr_linenumber" name="L136" href="#L136">136</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="L137" href="#L137">137</a> <em class="jxr_javadoccomment">     * @param klass</em>
<a class="jxr_linenumber" name="L138" href="#L138">138</a> <em class="jxr_javadoccomment">     *            the klass</em>
<a class="jxr_linenumber" name="L139" href="#L139">139</a> <em class="jxr_javadoccomment">     * @param fieldName</em>
<a class="jxr_linenumber" name="L140" href="#L140">140</a> <em class="jxr_javadoccomment">     *            字段名称</em>
<a class="jxr_linenumber" name="L141" href="#L141">141</a> <em class="jxr_javadoccomment">     * @return 如果 &lt;code&gt;klass&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L142" href="#L142">142</a> <em class="jxr_javadoccomment">     *         如果 &lt;code&gt;fieldName&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L143" href="#L143">143</a> <em class="jxr_javadoccomment">     *         如果 &lt;code&gt;fieldName&lt;/code&gt; 是blank,抛出 {@link IllegalArgumentException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L144" href="#L144">144</a> <em class="jxr_javadoccomment">     * @see java.lang.Class#getDeclaredField(String)</em>
<a class="jxr_linenumber" name="L145" href="#L145">145</a> <em class="jxr_javadoccomment">     * @see org.apache.commons.lang3.reflect.FieldUtils#getDeclaredField(Class, String, boolean)</em>
<a class="jxr_linenumber" name="L146" href="#L146">146</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L147" href="#L147">147</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> Field getDeclaredField(Class&lt;?&gt; klass,String fieldName){
<a class="jxr_linenumber" name="L148" href="#L148">148</a>         Validate.notNull(klass, <span class="jxr_string">"klass can't be null!"</span>);
<a class="jxr_linenumber" name="L149" href="#L149">149</a>         Validate.notEmpty(fieldName, <span class="jxr_string">"fieldName can't be null/empty!"</span>);
<a class="jxr_linenumber" name="L150" href="#L150">150</a>         <strong class="jxr_keyword">try</strong>{
<a class="jxr_linenumber" name="L151" href="#L151">151</a>             <strong class="jxr_keyword">return</strong> klass.getDeclaredField(fieldName);
<a class="jxr_linenumber" name="L152" href="#L152">152</a>         }<strong class="jxr_keyword">catch</strong> (Exception e){
<a class="jxr_linenumber" name="L153" href="#L153">153</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ReflectException(e);
<a class="jxr_linenumber" name="L154" href="#L154">154</a>         }
<a class="jxr_linenumber" name="L155" href="#L155">155</a>     }
<a class="jxr_linenumber" name="L156" href="#L156">156</a> 
<a class="jxr_linenumber" name="L157" href="#L157">157</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L158" href="#L158">158</a> <em class="jxr_javadoccomment">     * 得到指定类 &lt;code&gt;className&lt;/code&gt; 的静态公共字段 &lt;code&gt;fieldName&lt;/code&gt; 值.</em>
<a class="jxr_linenumber" name="L159" href="#L159">159</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L160" href="#L160">160</a> <em class="jxr_javadoccomment">     * &lt;pre class="code"&gt;</em>
<a class="jxr_linenumber" name="L161" href="#L161">161</a> <em class="jxr_javadoccomment">     * FieldUtil.getStaticFieldValue("com.feilong.core.HttpMethodType", "POST") = HttpMethodType.POST</em>
<a class="jxr_linenumber" name="L162" href="#L162">162</a> <em class="jxr_javadoccomment">     * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="L163" href="#L163">163</a> <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L164" href="#L164">164</a> <em class="jxr_javadoccomment">     * @param &lt;T&gt;</em>
<a class="jxr_linenumber" name="L165" href="#L165">165</a> <em class="jxr_javadoccomment">     *            the generic type</em>
<a class="jxr_linenumber" name="L166" href="#L166">166</a> <em class="jxr_javadoccomment">     * @param className</em>
<a class="jxr_linenumber" name="L167" href="#L167">167</a> <em class="jxr_javadoccomment">     *            类名,e.g com.feilong.io.ImageType</em>
<a class="jxr_linenumber" name="L168" href="#L168">168</a> <em class="jxr_javadoccomment">     * @param fieldName</em>
<a class="jxr_linenumber" name="L169" href="#L169">169</a> <em class="jxr_javadoccomment">     *            字段名</em>
<a class="jxr_linenumber" name="L170" href="#L170">170</a> <em class="jxr_javadoccomment">     * @return 如果 &lt;code&gt;className&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L171" href="#L171">171</a> <em class="jxr_javadoccomment">     *         如果 &lt;code&gt;fieldName&lt;/code&gt; 是null,抛出 {@link NullPointerException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L172" href="#L172">172</a> <em class="jxr_javadoccomment">     *         如果 &lt;code&gt;fieldName&lt;/code&gt; 是blank,抛出 {@link IllegalArgumentException}&lt;br&gt;</em>
<a class="jxr_linenumber" name="L173" href="#L173">173</a> <em class="jxr_javadoccomment">     * @see ClassUtil#loadClass(String)</em>
<a class="jxr_linenumber" name="L174" href="#L174">174</a> <em class="jxr_javadoccomment">     * @see java.lang.Class#getField(String)</em>
<a class="jxr_linenumber" name="L175" href="#L175">175</a> <em class="jxr_javadoccomment">     * @see java.lang.reflect.Field#get(Object)</em>
<a class="jxr_linenumber" name="L176" href="#L176">176</a> <em class="jxr_javadoccomment">     * @see org.apache.commons.lang3.reflect.FieldUtils#getField(Class, String)</em>
<a class="jxr_linenumber" name="L177" href="#L177">177</a> <em class="jxr_javadoccomment">     * @since 1.4.0</em>
<a class="jxr_linenumber" name="L178" href="#L178">178</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L179" href="#L179">179</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> &lt;T&gt; T getStaticFieldValue(String className,String fieldName){
<a class="jxr_linenumber" name="L180" href="#L180">180</a>         Validate.notNull(className, <span class="jxr_string">"className can't be null!"</span>);
<a class="jxr_linenumber" name="L181" href="#L181">181</a>         Validate.notBlank(fieldName, <span class="jxr_string">"fieldName can't be blank!"</span>);
<a class="jxr_linenumber" name="L182" href="#L182">182</a> 
<a class="jxr_linenumber" name="L183" href="#L183">183</a>         Class&lt;?&gt; ownerClass = ClassUtil.getClass(className);
<a class="jxr_linenumber" name="L184" href="#L184">184</a>         <strong class="jxr_keyword">return</strong> getFieldValue(ownerClass, fieldName, ownerClass);
<a class="jxr_linenumber" name="L185" href="#L185">185</a>     }
<a class="jxr_linenumber" name="L186" href="#L186">186</a> 
<a class="jxr_linenumber" name="L187" href="#L187">187</a>     <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L188" href="#L188">188</a> <em class="jxr_javadoccomment">     * 获得指定类 &lt;code&gt;ownerClass&lt;/code&gt; 指定字段 &lt;code&gt;fieldName&lt;/code&gt;的 值.</em>
<a class="jxr_linenumber" name="L189" href="#L189">189</a> <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="L190" href="#L190">190</a> <em class="jxr_javadoccomment">     * @param &lt;T&gt;</em>
<a class="jxr_linenumber" name="L191" href="#L191">191</a> <em class="jxr_javadoccomment">     *            the generic type</em>
<a class="jxr_linenumber" name="L192" href="#L192">192</a> <em class="jxr_javadoccomment">     * @param ownerClass</em>
<a class="jxr_linenumber" name="L193" href="#L193">193</a> <em class="jxr_javadoccomment">     *            the owner class</em>
<a class="jxr_linenumber" name="L194" href="#L194">194</a> <em class="jxr_javadoccomment">     * @param fieldName</em>
<a class="jxr_linenumber" name="L195" href="#L195">195</a> <em class="jxr_javadoccomment">     *            the field name</em>
<a class="jxr_linenumber" name="L196" href="#L196">196</a> <em class="jxr_javadoccomment">     * @param ownerObj</em>
<a class="jxr_linenumber" name="L197" href="#L197">197</a> <em class="jxr_javadoccomment">     *            object from which the represented field's value is to be extracted</em>
<a class="jxr_linenumber" name="L198" href="#L198">198</a> <em class="jxr_javadoccomment">     * @return the class field value</em>
<a class="jxr_linenumber" name="L199" href="#L199">199</a> <em class="jxr_javadoccomment">     * @see org.apache.commons.lang3.reflect.FieldUtils#getField(Class, String, boolean)</em>
<a class="jxr_linenumber" name="L200" href="#L200">200</a> <em class="jxr_javadoccomment">     * @since 1.7.1</em>
<a class="jxr_linenumber" name="L201" href="#L201">201</a> <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L202" href="#L202">202</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="L203" href="#L203">203</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> &lt;T&gt; T getFieldValue(Class&lt;?&gt; ownerClass,String fieldName,Object ownerObj){
<a class="jxr_linenumber" name="L204" href="#L204">204</a>         <strong class="jxr_keyword">try</strong>{
<a class="jxr_linenumber" name="L205" href="#L205">205</a>             <em class="jxr_comment">//注意, 不能直接用 Class#getField(String), 他只能取 public的字段</em>
<a class="jxr_linenumber" name="L206" href="#L206">206</a>             Field field = FieldUtils.getField(ownerClass, fieldName, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="L207" href="#L207">207</a>             <strong class="jxr_keyword">return</strong> (T) field.get(ownerObj);
<a class="jxr_linenumber" name="L208" href="#L208">208</a>         }<strong class="jxr_keyword">catch</strong> (Exception e){
<a class="jxr_linenumber" name="L209" href="#L209">209</a>             String message = Slf4jUtil.format(<span class="jxr_string">"ownerClass:[{}],fieldName:[{}],ownerObj:[{}]"</span>, ownerClass.getName(), fieldName, ownerObj);
<a class="jxr_linenumber" name="L210" href="#L210">210</a>             LOGGER.error(message, e);
<a class="jxr_linenumber" name="L211" href="#L211">211</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ReflectException(message, e);
<a class="jxr_linenumber" name="L212" href="#L212">212</a>         }
<a class="jxr_linenumber" name="L213" href="#L213">213</a>     }
<a class="jxr_linenumber" name="L214" href="#L214">214</a> }
</pre>
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